William w



Oct. 23 1923;

I w. w. VOSPER PIPE CUTTING APPARATUS lll ed Dec. 31. 1921 INVENTCIE- V a I Patented Oct. 23, 1923.

UNITED STATES PATENT OFFICE.

WILLIAIvI \V. VOSPER, OF TOLEDO. OHIO, ASSIGNOR TO THE TOLEDO PIPE THREADING MACHINE COMPANY, OF TOLEDO, 01-110, A CORPORATION OF OHIO.

PIPE-CUTTING APPARATUS.

Application filed December 31, 1921. Serial No. 526,130.

To all whom it may concern:

Be it known that I, WVILLIAM W. Vosrnn, a citizen of the United States, and a resident of Toledo, county of Lucas, and State of Ohio, have made an Invention Appertaining to a Pipe-Cutting Apparatus; and I do hereby declare the following to be a full, clear, and exact description-of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of refer ence marked thereon, which form a part of this spccificaton.

This invention relates to pipe threading and cutting-off machines, and particularly to those of the power driven type in which the work is rotated. and the chaser carrying head is held against turning.

The object of my invention is the provision of a simple and eflicient apparatus of the class described, which is strong and durablc in its construction, powerful in its action and capable of being easily engaged to or removed from a work piece, whereby to enhance the practicability and commercial value of the apparatus.

A further object of the invention is the provision of an apparatus of the class described which is permanently connected to its power unit and is easily portable from place to place.

The invention is fully described in the following specification, and while, in its broader aspect, it is capable of embodiment in numerous forms, preferred embodiment thereof illustrated in the accompanying drawings, in which,

Figure l. is a rear elevation of a unit embodying the invention with parts broken away. Fig. 2 is a cross-section on the line 2-2 in Fig. 1, with parts broken away and with the die-head hands turned in vertical position. Fig. 3 is a front elevation of the pipe receiving and holding means with a threading head in connection therewith and with parts broken away, and Fig. 1 is a section on the line 1 in Fig. 2.

Referring to the drawings, 1 designates a pipe or other cylindrical work piece, 2 a work centering sleeve mounted thereon, and 3 a bearing sleeve mounted on the sleeve 2 and having an annular flange 4 at one end. A. bevel gear 5 is mounted on the sleeve 3 and is held thereon by the flange i and collar 6 mounted on the sleeve. The collar is in toothed engagement with the gear 5, as shown at 7, to cause a positive driving of one by the other. A shell Or housing 8 mounted on the collar 6 and projects forward therefrom, being provided at its forward end with an annular bearing 9 on which a collar 10 is mounted for free turning movements, being loosely held thereon by a nut 11 threaded on the forward end of the housing.

One or more screws 12 are threaded into the housing 8 and collar 6 to rigidly connect the same, and a plurality of work clamping screws 13, in the present instance three in. number, are extended through registering openings 14: in the shell 8 and collar 6 and. threaded at their inner end portions through the sleeve 3 and projected through registering openings in the sleeve 2 in position to have clamping engagement at their inner ends with a pipe or work piece 1, as shown in Fig. 1. The screws 13 retain the sleeves 2 and 3 and collar 6 in assembled relation and may be withdrawn from engagement with the inner sleeve 2 when it is desired to remove such sleeve from the sleeve 3 to substitute therefor a sleeve 2 having a work receiving opening of different size. The sleeve 2 has a stop flange 15 at its outer end for coaction with the adjacent end of the sleeve 3.

The gear 5 is enclosed by a housing 16 of annular internally channeled form which rests at its internal side edges on annular flanges 17 projecting from opposite sides of the gear 5, the gear being thus permitted to have a free turning movement in the housing. A tubular shell 18 rigidly projects from the housing 16 at one side of its axis and connects to the housing of a motor 19, which is mounted for portable movements on a truck 20. The shaft 21 of the motor extends through the shell 18 and carries a bevel-gear 22 with-in the housing 16 in mesh with the gear 5.

A pipe threading head 23 has a tubular part 24. projecting from its inner side and provided with an external lead thread for threading into the outer end of the housing 8 in axial register with the work 1. The head 23 carries a plurality of radially movable thread cutting chasers 25 for threading iii out heirinner ends with the ee 1, WOii understood in the he onto ends of the chasers hear d sides of tie pins pr jee the collar through openings in the head at the outer end of the respective chasers. it is thus evident that an outward turning oi the heed 23 relative tic housi will cause the chasers to move outiva the tapered sin iaces of the pins therehy gradually adjusted to cut a tanered tireee, as is Weii understood. in the and for the parert. Nethin new is ciai.

1 e ticuier thread cu't unit employed. 1J1 a Q 'prekc s forward from the housing 4o enne e one of e a s 28 23 to hold the head against turning; during; a LUI'nli'l of the Work 1 thread 1 enga ,rnent with the chasers the arzn 2? may he removed to pQTlfiit a hand turning of the cutter heao 23 if desired.

It is evident in the use of an apparatus einho vi my invention that when a Work pi inserted within centerin sleeve :eiiy secured 2' inst turning rei- :t ereto by a titynteningg oi. the set the motor may t ien he started. to :irin of the r 5 Which in tu e "1 n'lich it has this cc tar drives th is sieeims 2 and ti? a 13 Whfie the cu 7 t1 ti lv arm 2 I mew on the port 2% is caused to thread into the rousing 8 to graduaiiy move the chasers ariaily oi the work as the cutting e and at the e time. the chasers e 7 ed to move racially outward by reason or the movement ct the some {11011;}: the tapered pins The honsingg 16 provides carrying means for the unit and at the same time encioses the gears 5 and 22.

Wish it understood that my invention is not limited to any specific construction arrangement or term of the parts as it is enable or eniiodiinent in numerous forms Without departing from the spirit of the eieiins.

Having thus described my invention,

etters what i claim as new, and desire to secure by Letters Patent, is,

1. in conihination in an apparatus of the escrihert, a ousing, a gear having" a sing, a pipe centering and rie st means in Work engaging; rel "or criviiie the gear, and 1L8 the cutting rneans against rot n eans driven by the gear.

ion, in an apparatus of the cis gear, a housing mounted on and enclosing the eeri Work holding; and means en ed and criven by the it n: getsand having an extension at one ene tenered thread cutt unit carried by movements releeeting' the housing reiat've turning;

t 2 r J the e: tension .101

o prevent a 1 power connect-ed t the i/ a driving connection with honsrn the {fee a In combination, in an anparatus of the ciess described hearing sleeve, a Work entering steer 1 tie hearing si-eci'e and QZiSHY o al, e therefrom, a

ear mounted on the hearin sieere, a collar mted on he hear ng: sieeve in positive rent with the gear a housing e coiiar and projecting" for- 1 Work clampi means es" the housing coiiar and 1 reiative turning thereoii ounted on and enclosing an extension therethrough and into the honsine,- a gear on the ive shatt extending theredrive sh in engagement with the first gem. tapered thread cutting unit carried by the housing for relative rotation and opcrahie go out a tapered thread on \vori; i iece when the housing: and unit are reia ively turned and an arm n oiectino' from he second housingtor BHQJHfjC-Bltllt with the timed cutting unit to hold it against turnno; relative to the second housing.

in testimony whereof i have hereunto signed my name to this s 'iecification.

i VILLTZAM 

